GB2161336B - Television video signal a/d converter - Google Patents

Television video signal a/d converter

Info

Publication number
GB2161336B
GB2161336B GB08512545A GB8512545A GB2161336B GB 2161336 B GB2161336 B GB 2161336B GB 08512545 A GB08512545 A GB 08512545A GB 8512545 A GB8512545 A GB 8512545A GB 2161336 B GB2161336 B GB 2161336B
Authority
GB
United Kingdom
Prior art keywords
converter
video signal
television video
television
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB08512545A
Other versions
GB2161336A (en
GB8512545D0 (en
Inventor
Koji Yamagishi
Takahiro Fuse
Masao Kawamura
Shinichi Matsui
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Casio Computer Co Ltd
Original Assignee
Casio Computer Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP59103034A external-priority patent/JPS60247378A/en
Priority claimed from JP4603385A external-priority patent/JP2569301B2/en
Priority claimed from JP60046032A external-priority patent/JPH0681285B2/en
Application filed by Casio Computer Co Ltd filed Critical Casio Computer Co Ltd
Publication of GB8512545D0 publication Critical patent/GB8512545D0/en
Publication of GB2161336A publication Critical patent/GB2161336A/en
Application granted granted Critical
Publication of GB2161336B publication Critical patent/GB2161336B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57—Control of contrast or brightness
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/12—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by switched stationary formation of lamps, photocells or light relays
    • H04N3/127—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by switched stationary formation of lamps, photocells or light relays using liquid crystals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/60—Analogue/digital converters with intermediate conversion to frequency of pulses
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/34—Analogue value compared with reference values
    • H03M1/36—Analogue value compared with reference values simultaneously only, i.e. parallel type
    • H03M1/361—Analogue value compared with reference values simultaneously only, i.e. parallel type having a separate comparator and reference value for each quantisation level, i.e. full flash converter type

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
GB08512545A 1984-05-22 1985-05-17 Television video signal a/d converter Expired GB2161336B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP59103034A JPS60247378A (en) 1984-05-22 1984-05-22 A/d converting circuit of video signal
JP4603385A JP2569301B2 (en) 1985-03-08 1985-03-08 A / D converter
JP60046032A JPH0681285B2 (en) 1985-03-08 1985-03-08 A / D converter

Publications (3)

Publication Number Publication Date
GB8512545D0 GB8512545D0 (en) 1985-06-19
GB2161336A GB2161336A (en) 1986-01-08
GB2161336B true GB2161336B (en) 1987-04-29

Family

ID=27292483

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08512545A Expired GB2161336B (en) 1984-05-22 1985-05-17 Television video signal a/d converter

Country Status (4)

Country Link
US (1) US4642694A (en)
KR (1) KR890004222B1 (en)
DE (1) DE3518432A1 (en)
GB (1) GB2161336B (en)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8524880D0 (en) * 1985-10-09 1985-11-13 British Telecomm Video level control
JPH0783487B2 (en) * 1986-04-11 1995-09-06 カシオ計算機株式会社 Color video signal level control circuit
DE3710291A1 (en) * 1987-03-28 1988-10-13 Thomson Brandt Gmbh CIRCUIT FOR ANALOG / DIGITAL CONVERSION OF SIGNALS OF DIFFERENT LEVELS
US4831382A (en) * 1987-05-26 1989-05-16 American Telephone And Telegraph Company Analog-to-digital converter with adaptable quantizing levels
US4827191A (en) * 1987-09-08 1989-05-02 Motorola, Inc. Adaptive range/DC restoration circuit or use with analog to digital convertors
KR920001287B1 (en) * 1988-02-12 1992-02-10 니혼 호오소오 고오카이 Digital video signal processing apparatus
JP2678006B2 (en) * 1988-03-04 1997-11-17 松下電器産業株式会社 Automatic gain control device
JPH02168296A (en) * 1988-12-22 1990-06-28 Mitsubishi Electric Corp Liquid crystal display device
JP2722351B2 (en) * 1989-11-29 1998-03-04 キヤノン株式会社 Imaging signal processing device
US5359675A (en) * 1990-07-26 1994-10-25 Ronald Siwoff Video spectacles
US5267331A (en) * 1990-07-26 1993-11-30 Ronald Siwoff Digitally enhanced imager for the visually impaired
US5194865A (en) * 1991-12-06 1993-03-16 Interbold Analog-to-digital converter circuit having automatic range control
EP0603593B1 (en) * 1992-12-23 1998-01-21 Eastman Kodak Company Automatic channel gain and offset balance for video cameras employing multichannel sensors
US5790061A (en) * 1995-02-24 1998-08-04 Nec Corporation Adaptive A/D converting device for adaptively converting and input analog signal into an output digital signal having a constant quantizing error
JP3470440B2 (en) * 1995-02-28 2003-11-25 ソニー株式会社 Lamp signal generation method, lamp signal generation device, liquid crystal driving device, and liquid crystal display device
GB2323493A (en) * 1997-02-25 1998-09-23 British Broadcasting Corp Quantisation for compression systems
US6275259B1 (en) * 1998-02-02 2001-08-14 International Business Machines Corporation Digital automatic gain control circuit for image system
EP0982709A1 (en) * 1998-08-24 2000-03-01 Alps Electric Co., Ltd. Liquid crystal display with contrast adjustment
KR100580424B1 (en) 1998-09-01 2006-05-16 마이크로나스 무니크 게엠베하 Circuit for controlling luminance signal amplitude
GB2363926A (en) * 2000-06-23 2002-01-09 Sony Uk Ltd Colour component signal interface circuit
JP4977573B2 (en) * 2007-10-11 2012-07-18 オンセミコンダクター・トレーディング・リミテッド Auto gain control circuit in video signal processor
EP2073383B1 (en) 2007-12-19 2011-08-10 Sequans Communications Amplifier arrangement
KR101448642B1 (en) * 2008-04-22 2014-10-08 엘지전자 주식회사 Method for controlling black level of input signal and display unit enabling of the method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1247051B (en) * 1965-06-18 1967-08-10 Siemens Ag Circuit arrangement to compensate for changes in contrast when digitizing video signals
US4101839A (en) * 1974-11-27 1978-07-18 The United States Of America As Represented By The Secretary Of The Navy Analog-digital ratio detector
JPS5218132A (en) * 1975-08-01 1977-02-10 Hitachi Ltd Binary circuit
DE3020061C2 (en) * 1980-04-02 1986-02-20 Waldemar Dipl.-Ing. 7204 Wurmlingen Kehler Redundancy reducing, multiple adaptive quantization of a range of values, particularly suitable for optimized coding and decoding of (D) PCM signals at a fixed bit rate
US4395732A (en) * 1981-08-19 1983-07-26 Motorola Inc. Statistically adaptive analog to digital converter
US4403253A (en) * 1981-12-28 1983-09-06 General Electric Company Uniform distribution video processor with controlled reference voltages
JPS58164387A (en) * 1982-03-24 1983-09-29 Casio Comput Co Ltd A/d converter for video signal
US4558348A (en) * 1983-12-30 1985-12-10 Rca Corporation Digital video signal processing system using asynchronous a-to-d encoding

Also Published As

Publication number Publication date
US4642694A (en) 1987-02-10
KR890004222B1 (en) 1989-10-27
DE3518432A1 (en) 1985-11-28
KR850008081A (en) 1985-12-11
GB2161336A (en) 1986-01-08
GB8512545D0 (en) 1985-06-19
DE3518432C2 (en) 1989-10-26

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19960517